//: Playground - noun: a place where people can play

import UIKit

// 创建对象的时候,会给对象分配一个独一无二的标识
class Student {

}

let x = Student();
let y = x;

print(ObjectIdentifier(x) == ObjectIdentifier(y))

print(x === y)

let z = Student();

print(ObjectIdentifier(x) == ObjectIdentifier(z))

print(x === z)





		